Membrane Processes for Microalgae in Carbonation and Wastewater Treatment

Sarbatly, Rosalam; Suali, Emma; Lahin, Farhana Abd; Chiam, Chel-Ken

doi:10.1007/978-3-319-17915-5_18

Cited by 2 publications

(1 citation statement)

References 41 publications

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“…However, study of hollow fibre membrane rarely discussed although it increases CO2 uptake [3][4][5]. Microalgae has potential to produce sufficient biomass if cultivated under CO2 with a mean to remove photosynthetic O2 [6].…”

Section: Introductionmentioning

confidence: 99%

Effect of membrane on carbonation and carbon dioxide uptake ofChlorellasp.

Suali¹,

Sarbatly²,

Anisuzzaman³

et al. 2017

MATEC Web Conf.

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Recent studies showed that as low as 5% CO2 increased microalgae growth. However, common bioreactor operation resulted in low carbonation due to poor CO2 mass transfer and this inhibited CO2 uptake of microalgae. Although bubbling increases mass transfer of CO2-O2 exchange, preserving high dissolved CO2 remains the most challenging of microalgae cultivation in bioreactor. In order to increase high dissolved CO2 and CO2-O2 exchange, this study employed two types of membrane; hollow-fibre membrane for carbonation and hydrophobic membrane for deoxygenation. It was found that membrane increased carbonation from 20 % to 75 % when operated at control CO2 concentration. The hollow-fibre membrane capable of creating as small as 2 mm bubble which effective for high carbonation. At the same time, it increased CO2 uptake up to 85% in bioreactor. The hydrophobic membrane removed 43% O2 from the bioreactor. Both membranes increased mass transfer of CO2-O2 exchange in bioreactor which stimulated microalgae growth.

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Section: Introductionmentioning

confidence: 99%

Effect of membrane on carbonation and carbon dioxide uptake ofChlorellasp.

Suali¹,

Sarbatly²,

Anisuzzaman³

et al. 2017

MATEC Web Conf.

Self Cite

View full text Add to dashboard Cite

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Investigation on the role of surfactants in bubble-algae interaction in flotation harvesting of Chlorella vulgaris

Shen

Wen

et al. 2018

Sci Rep

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In this work, a fundamental study was carried out on the role of surfactants in bubble-algae interaction to improve the understanding of how surfactants influence the flotation performance. Flotation tests for harvesting Chlorella vulgaris were first conducted using two surfactants, hexadecyltrimethyl ammonium bromide (C16TAB) and tea saponin. The effect of surfactants on harvesting efficiency was found to depend on their type and concentration. The present results also indicated that C16TAB exhibited higher harvesting efficiency than tea saponin. The adsorption experiments of surfactants onto C. vulgaris and the characterization measurements of algae surface were then carried out to reveal underlying interaction mechanisms between surfactants and algae in air flotation process. The results confirmed the adsorption process of surfactants onto C. vulgaris was feasible, spontaneous and endothermic. Subsequently, two mechanism models were proposed to qualitatively establish the interaction relationship among algae, surfactants and bubbles in the flotation. According to two models, C16TAB could neutralize the algal potential, while tea saponin converted algal surface from hydrophilic into hydrophobic. Overall, two surfactants used here could facilitate attachment of C. vulgaris onto bubbles, making the algae easier to be harvested, thereby increasing the flotation recovery.

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Membrane Processes for Microalgae in Carbonation and Wastewater Treatment

Cited by 2 publications

References 41 publications

Effect of membrane on carbonation and carbon dioxide uptake ofChlorellasp.

Effect of membrane on carbonation and carbon dioxide uptake ofChlorellasp.

Investigation on the role of surfactants in bubble-algae interaction in flotation harvesting of Chlorella vulgaris

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